void phantom_unix_fs_init()
{
hal_mutex_init( &mm, "rootfs" );
add_mount( "/dev", "devfs", &dev_fs );
add_mount( "/proc", "procfs", &proc_fs );
add_mount( "udp://", "udpfs", &udp_fs );
add_mount( "tcp://", "tcpfs", &tcp_fs );
}
int usys_mount( int *err, uuprocess_t *u, const char *source, const char *target, const char *fstype, int flags, const void *data )
{
(void) u;
(void) flags;
(void) fstype;
uufs_t *fs = 0;
if( strcmp( data, "procfs" ) )
fs = &proc_fs;
if( strcmp( data, "devfs" ) )
fs = &dev_fs;
// TODO connect to real FS code and devices
if( fs == 0 )
{
*err = ENOTBLK;
return -1;
}
*err = add_mount( target, source, fs );
return *err ? -1 : 0;
}
static int add_root_mount(void) {
_cleanup_free_ char *what = NULL;
const char *opts;
if (isempty(arg_root_what)) {
log_debug("Could not find a root= entry on the kernel command line.");
return 0;
}
what = fstab_node_to_udev_node(arg_root_what);
if (!path_is_absolute(what)) {
log_debug("Skipping entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype));
return 0;
}
if (!arg_root_options)
opts = arg_root_rw > 0 ? "rw" : "ro";
else if (arg_root_rw >= 0 ||
!fstab_test_option(arg_root_options, "ro\0" "rw\0"))
opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro");
else
opts = arg_root_options;
log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype));
return add_mount(what,
"/sysroot",
arg_root_fstype,
opts,
1,
false,
false,
false,
SPECIAL_INITRD_ROOT_FS_TARGET,
"/proc/cmdline");
}
static int probe_and_add_mount(
const char *id,
const char *what,
const char *where,
bool rw,
const char *description,
const char *post) {
_cleanup_blkid_free_probe_ blkid_probe b = NULL;
const char *fstype;
int r;
assert(id);
assert(what);
assert(where);
assert(description);
if (path_is_mount_point(where, true) <= 0 &&
dir_is_empty(where) <= 0) {
log_debug("%s already populated, ignoring.", where);
return 0;
}
/* Let's check the partition type here, so that we know
* whether to do LUKS magic. */
errno = 0;
b = blkid_new_probe_from_filename(what);
if (!b) {
if (errno == 0)
return log_oom();
log_error_errno(errno, "Failed to allocate prober: %m");
return -errno;
}
blkid_probe_enable_superblocks(b, 1);
blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE);
errno = 0;
r = blkid_do_safeprobe(b);
if (r == -2 || r == 1) /* no result or uncertain */
return 0;
else if (r != 0) {
if (errno == 0)
errno = EIO;
log_error_errno(errno, "Failed to probe %s: %m", what);
return -errno;
}
blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
return add_mount(
id,
what,
where,
fstype,
rw,
description,
post);
}
static int parse_fstab(void) {
FILE *f;
int r = 0;
struct mntent *me;
errno = 0;
f = setmntent("/etc/fstab", "r");
if (!f) {
if (errno == ENOENT)
return 0;
log_error("Failed to open /etc/fstab: %m");
return -errno;
}
while ((me = getmntent(f))) {
char _cleanup_free_ *where = NULL, *what = NULL;
int k;
what = fstab_node_to_udev_node(me->mnt_fsname);
where = strdup(me->mnt_dir);
if (!what || !where) {
r = log_oom();
goto finish;
}
if (is_path(where))
path_kill_slashes(where);
log_debug("Found entry what=%s where=%s type=%s", what, where, me->mnt_type);
if (streq(me->mnt_type, "swap"))
k = add_swap(what, me);
else {
bool noauto, nofail, automount, isbind, isnetwork;
noauto = !!hasmntopt(me, "noauto");
nofail = !!hasmntopt(me, "nofail");
automount =
hasmntopt(me, "comment=systemd.automount") ||
hasmntopt(me, "x-systemd.automount");
isbind = mount_is_bind(me);
isnetwork = mount_is_network(me);
k = add_mount(what, where, me->mnt_type, me->mnt_opts,
me->mnt_passno, false, noauto, nofail,
automount, isbind, isnetwork,
"/etc/fstab");
}
if (k < 0)
r = k;
}
finish:
endmntent(f);
return r;
}
static int add_usr_mount(void) {
_cleanup_free_ char *what = NULL;
const char *opts;
if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options)
return 0;
if (arg_root_what && !arg_usr_what) {
arg_usr_what = strdup(arg_root_what);
if (!arg_usr_what)
return log_oom();
}
if (arg_root_fstype && !arg_usr_fstype) {
arg_usr_fstype = strdup(arg_root_fstype);
if (!arg_usr_fstype)
return log_oom();
}
if (arg_root_options && !arg_usr_options) {
arg_usr_options = strdup(arg_root_options);
if (!arg_usr_options)
return log_oom();
}
if (!arg_usr_what)
return 0;
what = fstab_node_to_udev_node(arg_usr_what);
if (!path_is_absolute(what)) {
log_debug("Skipping entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype));
return -1;
}
if (!arg_usr_options)
opts = arg_root_rw > 0 ? "rw" : "ro";
else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0"))
opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro");
else
opts = arg_usr_options;
log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype));
return add_mount(what,
"/sysroot/usr",
arg_usr_fstype,
opts,
1,
false,
false,
false,
SPECIAL_INITRD_ROOT_FS_TARGET,
"/proc/cmdline");
}
static void add_mount_inside(char *base, char *src, char *dst,
char *type, unsigned long f, void *d) {
int rc;
_free_ char *target = NULL;
rc = asprintf(&target, "%s%s", base, dst);
if (rc < 0) fail_printf("OOM");
add_mount(src, target, type, f, d);
}
static int parse_fstab(void) {
FILE *f;
int r = 0;
struct mntent *me;
errno = 0;
f = setmntent("/etc/fstab", "r");
if (!f) {
if (errno == ENOENT)
return 0;
log_error("Failed to open /etc/fstab: %m");
return -errno;
}
while ((me = getmntent(f))) {
char *where, *what;
int k;
what = fstab_node_to_udev_node(me->mnt_fsname);
if (!what) {
r = log_oom();
goto finish;
}
where = strdup(me->mnt_dir);
if (!where) {
r = log_oom();
free(what);
goto finish;
}
if (is_path(where))
path_kill_slashes(where);
log_debug("Found entry what=%s where=%s type=%s", what, where, me->mnt_type);
if (streq(me->mnt_type, "swap"))
k = add_swap(what, me);
else
k = add_mount(what, where, me);
free(what);
free(where);
if (k < 0)
r = k;
}
finish:
endmntent(f);
return r;
}
int mount_all(const char *jailroot) {
struct library *l;
struct mount *m;
avl_for_each_element(&libraries, l, avl)
add_mount(l->path, 1, -1);
avl_for_each_element(&mounts, m, avl)
if (mount_bind(jailroot, m->path, m->readonly, m->error))
return -1;
return 0;
}
int fuse_mnt_add_mount(const char *progname, const char *fsname,
const char *mnt, const char *type, const char *opts)
{
int res;
if (!mtab_needs_update(mnt))
return 0;
res = add_mount(progname, fsname, mnt, type, opts);
if (res == -1)
res = add_mount_legacy(progname, fsname, mnt, type, opts);
return res;
}
static int mount_fuse(const char *mnt, int flags)
{
int res;
int fd;
const char *dev = FUSE_DEV;
const char *type = "fuse";
struct stat stbuf;
res = check_perm(mnt, &stbuf);
if(res == -1)
return -1;
fd = open(dev, O_RDWR);
if(fd == -1) {
int status;
pid_t pid = fork();
if(pid == 0) {
setuid(0);
execl("/sbin/modprobe", "/sbin/modprobe", "fuse", NULL);
exit(1);
}
if(pid != -1)
waitpid(pid, &status, 0);
fd = open(dev, O_RDWR);
}
if(fd == -1) {
fprintf(stderr, "%s: unable to open fuse device %s: %s\n", progname,
dev, strerror(errno));
return -1;
}
res = do_mount(dev, mnt, type, stbuf.st_mode & S_IFMT, fd, flags);
if(res == -1)
return -1;
res = add_mount(dev, mnt, type);
if(res == -1) {
umount(mnt);
return -1;
}
return fd;
}
errno_t auto_mount( const char *name, uufs_t *fs, char *out_mnt_path, size_t outsz, int flags )
{
static int am_index = 0;
static char mpath[32];
snprintf( mpath, sizeof(mpath), "/amnt%d", am_index ++ );
SHOW_INFO( 0, "Partition %s mounted @ %s", name, mpath );
if( outsz && out_mnt_path )
strlcpy( out_mnt_path, mpath, outsz );
errno_t rc = add_mount( mpath, name, fs );
if( !rc && (flags & AUTO_MOUNT_FLAG_AUTORUN) )
hal_start_kernel_thread_arg( auto_run_thread, strdup(mpath) );
return rc;
}
static void hal_property_modified(LibHalContext *ctx, const char *udi,
const char *key, dbus_bool_t is_removed, dbus_bool_t is_added)
{
if (!strcmp(key, "volume.is_mounted")) {
if (libhal_device_get_property_bool(ctx, udi, "volume.is_mounted", NULL)) {
char *mountpoint = libhal_device_get_property_string(
ctx, udi, "volume.mount_point", NULL);
if (!strncmp(MEDIA_DIR, mountpoint, strlen(MEDIA_DIR))) {
add_mount(udi, mountpoint);
}
if (mountpoint)
libhal_free_string(mountpoint);
} else {
remove_mount(udi);
}
update_status();
}
}
static int parse_fstab(const char *prefix, bool initrd) {
_cleanup_free_ char *fstab_path = NULL;
FILE *f;
int r = 0;
struct mntent *me;
fstab_path = strjoin(strempty(prefix), "/etc/fstab", NULL);
if (!fstab_path)
return log_oom();
f = setmntent(fstab_path, "r");
if (!f) {
if (errno == ENOENT)
return 0;
log_error("Failed to open %s/etc/fstab: %m", strempty(prefix));
return -errno;
}
while ((me = getmntent(f))) {
_cleanup_free_ char *where = NULL, *what = NULL;
int k;
if (initrd && !mount_in_initrd(me))
continue;
what = fstab_node_to_udev_node(me->mnt_fsname);
where = strjoin(strempty(prefix), me->mnt_dir, NULL);
if (!what || !where) {
r = log_oom();
goto finish;
}
if (is_path(where))
path_kill_slashes(where);
log_debug("Found entry what=%s where=%s type=%s", what, where, me->mnt_type);
if (streq(me->mnt_type, "swap"))
k = add_swap(what, me);
else {
bool noauto, nofail, automount, isbind;
const char *pre, *pre2, *post, *online;
noauto = !!hasmntopt(me, "noauto");
nofail = !!hasmntopt(me, "nofail");
automount =
hasmntopt(me, "comment=systemd.automount") ||
hasmntopt(me, "x-systemd.automount");
isbind = mount_is_bind(me);
if (initrd) {
pre = pre2 = online = NULL;
post = SPECIAL_INITRD_FS_TARGET;
} else if (mount_in_initrd(me)) {
pre = pre2 = online = NULL;
post = SPECIAL_INITRD_ROOT_FS_TARGET;
} else if (mount_is_network(me)) {
pre = SPECIAL_REMOTE_FS_PRE_TARGET;
pre2 = SPECIAL_NETWORK_TARGET;
online = SPECIAL_NETWORK_ONLINE_TARGET;
post = SPECIAL_REMOTE_FS_TARGET;
} else {
pre = SPECIAL_LOCAL_FS_PRE_TARGET;
pre2 = online = NULL;
post = SPECIAL_LOCAL_FS_TARGET;
}
k = add_mount(what, where, me->mnt_type, me->mnt_opts,
me->mnt_passno, noauto, nofail, automount,
isbind, pre, pre2, online, post, fstab_path);
}
if (k < 0)
r = k;
}
finish:
endmntent(f);
return r;
}
static int mount_fuse(const char *mnt, const char *opts, char *devfd)
{
int res;
int fd;
char *dev;
struct stat stbuf;
char *type = NULL;
char *source = NULL;
char *mnt_opts = NULL;
const char *real_mnt = mnt;
int mountpoint_fd = -1;
fd = devfd ? check_fuse_device(devfd, &dev) : open_fuse_device(&dev);
if (fd == -1)
return -1;
drop_privs();
read_conf();
if (getuid() != 0 && mount_max != -1) {
int mount_count = count_fuse_fs();
if (mount_count >= mount_max) {
fprintf(stderr, "%s: too many FUSE filesystems mounted; mount_max=N can be set in /etc/fuse.conf\n", progname);
goto fail_close_fd;
}
}
res = check_version(dev);
if (res != -1) {
res = check_perm(&real_mnt, &stbuf, &mountpoint_fd);
restore_privs();
if (res != -1)
res = do_mount(real_mnt, &type, stbuf.st_mode & S_IFMT,
fd, opts, dev, &source, &mnt_opts,
stbuf.st_size);
} else
restore_privs();
if (mountpoint_fd != -1)
close(mountpoint_fd);
if (res == -1)
goto fail_close_fd;
res = chdir("/");
if (res == -1) {
fprintf(stderr, "%s: failed to chdir to '/'\n", progname);
goto fail_close_fd;
}
if (geteuid() == 0) {
res = add_mount(source, mnt, type, mnt_opts);
if (res == -1) {
/* Can't clean up mount in a non-racy way */
goto fail_close_fd;
}
}
out_free:
free(source);
free(type);
free(mnt_opts);
free(dev);
return fd;
fail_close_fd:
close(fd);
fd = -1;
goto out_free;
}
void add_mount_from_spec(char *spec) {
int rc;
size_t c;
_free_ char **opts = NULL;
_free_ char *tmp = strdup(spec);
if (tmp == NULL) fail_printf("OOM");
c = split_str(tmp, &opts, ",");
if (c == 0) fail_printf("Invalid mount spec '%s'", spec);
if (strncmp(opts[0], "bind", 4) == 0) {
_free_ char *src = NULL;
_free_ char *dst = NULL;
if (c < 3) fail_printf("Invalid mount spec '%s'", spec);
src = realpath(opts[1], NULL);
if (src == NULL) sysf_printf("realpath()");
dst = realpath(opts[2], NULL);
if (dst == NULL) sysf_printf("realpath()");
add_mount(src, dst, NULL, MS_BIND, NULL);
if (strncmp(opts[0], "bind-ro", 8) == 0)
add_mount(src, dst, NULL, MS_REMOUNT | MS_BIND | MS_RDONLY, NULL);
} else if (strncmp(opts[0], "aufs", 5) == 0) {
_free_ char *dst = NULL;
_free_ char *overlay = NULL;
_free_ char *aufs_opts = NULL;
if (c < 3) fail_printf("Invalid mount spec '%s'", spec);
overlay = realpath(opts[1], NULL);
if (overlay == NULL) sysf_printf("realpath()");
dst = realpath(opts[2], NULL);
if (dst == NULL) sysf_printf("realpath()");
rc = asprintf(&aufs_opts, "br:%s=rw:%s=ro", overlay, dst);
if (rc < 0) fail_printf("OOM");
add_mount(NULL, dst, "aufs", 0, aufs_opts);
} else if (strncmp(opts[0], "overlay", 8) == 0) {
_free_ char *dst = NULL;
_free_ char *overlay = NULL;
_free_ char *workdir = NULL;
_free_ char *overlayfs_opts = NULL;
if (c < 4) fail_printf("Invalid mount spec '%s'", spec);
overlay = realpath(opts[1], NULL);
if (overlay == NULL) sysf_printf("realpath()");
dst = realpath(opts[2], NULL);
if (dst == NULL) sysf_printf("realpath()");
workdir = realpath(opts[3], NULL);
if (workdir == NULL) sysf_printf("realpath()");
#ifdef HAVE_AUFS
rc = asprintf(&overlayfs_opts, "br:%s=rw:%s=ro", overlay, dst);
if (rc < 0) fail_printf("OOM");
add_mount(NULL, dst, "aufs", 0, overlayfs_opts);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0)
rc = asprintf(&overlayfs_opts,
"upperdir=%s,lowerdir=%s,workdir=%s",
overlay, dst, workdir);
if (rc < 0) fail_printf("OOM");
add_mount(NULL, dst, "overlay", 0, overlayfs_opts);
#else
fail_printf("The 'overlay' mount type is not supported");
#endif
} else if (strncmp(opts[0], "tmp", 4) == 0) {
_free_ char *dst = NULL;
if (c < 2) fail_printf("Invalid mount spec '%s'", spec);
dst = realpath(opts[1], NULL);
if (dst == NULL) sysf_printf("realpath()");
add_mount("tmpfs", dst, "tmpfs", 0, NULL);
} else {
fail_printf("Invalid mount type '%s'", opts[0]);
}
}
void add_mount_from_spec(const char *spec) {
int rc;
size_t c;
_free_ char **opts = NULL;
_free_ char *tmp = strdup(spec);
if (tmp == NULL) fail_printf("OOM");
c = split_str(tmp, &opts, ",");
if (c == 0) fail_printf("Invalid mount spec '%s'", spec);
if (strncmp(opts[0], "bind", 4) == 0) {
_free_ char *src = NULL;
_free_ char *dst = NULL;
if (c < 3) fail_printf("Invalid mount spec '%s'", spec);
src = realpath(opts[1], NULL);
if (src == NULL) sysf_printf("realpath()");
dst = realpath(opts[2], NULL);
if (dst == NULL) sysf_printf("realpath()");
add_mount(&mounts, src, dst, "bind", MS_BIND, NULL);
if (strncmp(opts[0], "bind-ro", 8) == 0)
add_mount(&mounts, src, dst, "bind-ro",
MS_REMOUNT | MS_BIND | MS_RDONLY, NULL);
} else if (strncmp(opts[0], "aufs", 5) == 0) {
_free_ char *dst = NULL;
_free_ char *overlay = NULL;
_free_ char *aufs_opts = NULL;
if (c < 3) fail_printf("Invalid mount spec '%s'", spec);
overlay = realpath(opts[1], NULL);
if (overlay == NULL) sysf_printf("realpath()");
dst = realpath(opts[2], NULL);
if (dst == NULL) sysf_printf("realpath()");
rc = asprintf(&aufs_opts, "br:%s=rw:%s=ro", overlay, dst);
if (rc < 0) fail_printf("OOM");
add_mount(&mounts, NULL, dst, "aufs", 0, aufs_opts);
} else if (strncmp(opts[0], "overlay", 8) == 0) {
_free_ char *dst = NULL;
_free_ char *overlay = NULL;
_free_ char *workdir = NULL;
if (c < 4) fail_printf("Invalid mount spec '%s'", spec);
overlay = realpath(opts[1], NULL);
if (overlay == NULL) sysf_printf("realpath()");
dst = realpath(opts[2], NULL);
if (dst == NULL) sysf_printf("realpath()");
workdir = realpath(opts[3], NULL);
if (workdir == NULL) sysf_printf("realpath()");
add_overlay_mount(&mounts, overlay, dst, workdir);
} else if (strncmp(opts[0], "tmp", 4) == 0) {
_free_ char *dst = NULL;
if (c < 2) fail_printf("Invalid mount spec '%s'", spec);
dst = realpath(opts[1], NULL);
if (dst == NULL) sysf_printf("realpath()");
add_mount(&mounts, "tmpfs", dst, "tmpfs", 0, NULL);
} else {
fail_printf("Invalid mount type '%s'", opts[0]);
}
}
static int parse_fstab(bool initrd) {
_cleanup_endmntent_ FILE *f = NULL;
const char *fstab_path;
struct mntent *me;
int r = 0;
fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab";
f = setmntent(fstab_path, "re");
if (!f) {
if (errno == ENOENT)
return 0;
log_error_errno(errno, "Failed to open %s: %m", fstab_path);
return -errno;
}
while ((me = getmntent(f))) {
_cleanup_free_ char *where = NULL, *what = NULL;
bool noauto, nofail;
int k;
if (initrd && !mount_in_initrd(me))
continue;
what = fstab_node_to_udev_node(me->mnt_fsname);
if (!what)
return log_oom();
if (is_device_path(what) && path_is_read_only_fs("sys") > 0) {
log_info("Running in a container, ignoring fstab device entry for %s.", what);
continue;
}
where = initrd ? strappend("/sysroot/", me->mnt_dir) : strdup(me->mnt_dir);
if (!where)
return log_oom();
if (is_path(where))
path_kill_slashes(where);
noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0");
log_debug("Found entry what=%s where=%s type=%s nofail=%s noauto=%s",
what, where, me->mnt_type,
yes_no(noauto), yes_no(nofail));
if (streq(me->mnt_type, "swap"))
k = add_swap(what, me, noauto, nofail);
else {
bool automount;
const char *post;
automount = fstab_test_option(me->mnt_opts,
"comment=systemd.automount\0"
"x-systemd.automount\0");
if (initrd)
post = SPECIAL_INITRD_FS_TARGET;
else if (mount_in_initrd(me))
post = SPECIAL_INITRD_ROOT_FS_TARGET;
else if (mount_is_network(me))
post = SPECIAL_REMOTE_FS_TARGET;
else
post = SPECIAL_LOCAL_FS_TARGET;
k = add_mount(what,
where,
me->mnt_type,
me->mnt_opts,
me->mnt_passno,
noauto,
nofail,
automount,
post,
fstab_path);
}
if (k < 0)
r = k;
}
return r;
}
static int add_automount(
const char *id,
const char *what,
const char *where,
const char *fstype,
bool rw,
const char *options,
const char *description,
usec_t timeout) {
_cleanup_free_ char *unit = NULL, *lnk = NULL;
_cleanup_free_ char *opt, *p = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(id);
assert(where);
assert(description);
if (options)
opt = strjoin(options, ",noauto", NULL);
else
opt = strdup("noauto");
if (!opt)
return log_oom();
r = add_mount(id,
what,
where,
fstype,
rw,
opt,
description,
NULL);
if (r < 0)
return r;
r = unit_name_from_path(where, ".automount", &unit);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", unit, NULL);
if (!p)
return log_oom();
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"Description=%s\n"
"Documentation=man:systemd-gpt-auto-generator(8)\n"
"[Automount]\n"
"Where=%s\n"
"TimeoutIdleSec=%lld\n",
description,
where,
(unsigned long long)timeout / USEC_PER_SEC);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", p);
lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/", unit, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(p, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
return 0;
}
static int mount_fuse(const char *mnt, const char *opts)
{
int res;
int fd;
char *dev;
struct stat stbuf;
char *type = NULL;
char *source = NULL;
char *mnt_opts = NULL;
const char *real_mnt = mnt;
int currdir_fd = -1;
int mountpoint_fd = -1;
fd = open_fuse_device(&dev);
if (fd == -1)
return -1;
drop_privs();
read_conf();
if (getuid() != 0 && mount_max != -1) {
int mount_count = count_fuse_fs();
if (mount_count >= mount_max) {
fprintf(stderr, "%s: too many FUSE filesystems mounted; mount_max=N can be set in /etc/fuse.conf\n", progname);
close(fd);
return -1;
}
}
res = check_version(dev);
if (res != -1) {
res = check_perm(&real_mnt, &stbuf, &currdir_fd, &mountpoint_fd);
restore_privs();
if (res != -1)
res = do_mount(real_mnt, &type, stbuf.st_mode & S_IFMT, fd, opts,
dev, &source, &mnt_opts, stbuf.st_size);
} else
restore_privs();
if (currdir_fd != -1) {
fchdir(currdir_fd);
close(currdir_fd);
}
if (mountpoint_fd != -1)
close(mountpoint_fd);
if (res == -1) {
close(fd);
return -1;
}
if (geteuid() == 0) {
res = add_mount(source, mnt, type, mnt_opts);
if (res == -1) {
umount2(mnt, 2); /* lazy umount */
close(fd);
return -1;
}
}
free(source);
free(type);
free(mnt_opts);
free(dev);
return fd;
}
int add_path_and_deps(const char *path, int readonly, int error, int lib)
{
assert(path != NULL);
if (lib == 0 && path[0] != '/') {
ERROR("%s is not an absolute path\n", path);
return error;
}
char *map = NULL;
int fd, ret = -1;
if (path[0] == '/') {
if (avl_find(&mounts, path))
return 0;
fd = open(path, O_RDONLY|O_CLOEXEC);
if (fd == -1)
return error;
add_mount(path, readonly, error);
} else {
if (avl_find(&libraries, path))
return 0;
char *fullpath;
fd = lib_open(&fullpath, path);
if (fd == -1)
return error;
if (fullpath) {
alloc_library(fullpath, path);
free(fullpath);
}
}
struct stat s;
if (fstat(fd, &s) == -1) {
ERROR("fstat(%s) failed: %s\n", path, strerror(errno));
ret = error;
goto out;
}
if (!S_ISREG(s.st_mode)) {
ret = 0;
goto out;
}
/* too small to be an ELF or a script -> "normal" file */
if (s.st_size < 4) {
ret = 0;
goto out;
}
map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (map == MAP_FAILED) {
ERROR("failed to mmap %s\n", path);
ret = -1;
goto out;
}
if (map[0] == '#' && map[1] == '!') {
ret = add_script_interp(path, map, s.st_size);
goto out;
}
if (map[0] == ELFMAG0 && map[1] == ELFMAG1 && map[2] == ELFMAG2 && map[3] == ELFMAG3) {
ret = elf_load_deps(path, map);
goto out;
}
ret = 0;
out:
if (fd >= 0)
close(fd);
if (map)
munmap(map, s.st_size);
return ret;
}
